I remember many times when I would think about the destruction of the wicked and the judgement of God with much gladness. On one hand, we know that everything God does is good and just, and this includes His vengeance. Maybe there is a time to rejoice. When enemies fall, Jesus is often exalted. Rejoicing in the exaltation of our Lord seems fitting, but there are scriptures that warn us against gloating over the ruin of others or finding pleasure in their sufferings or ruin.
From Proverbs 24:
16 For a just man falleth seven times, and riseth up again: but the wicked shall fall into mischief.
17 Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth:
18 Lest the Lord see it, and it displease him, and he turn away his wrath from him.
19 Fret not thyself because of evil men, neither be thou envious at the wicked:
20 For there shall be no reward to the evil man; the candle of the wicked shall be put out.
21 My son, fear thou the Lord and the king: and meddle not with them that are given to change:
22 For their calamity shall rise suddenly; and who knoweth the ruin of them both?
23 These things also belong to the wise. It is not good to have respect of persons in judgment.
24 He that saith unto the wicked, Thou are righteous; him shall the people curse, nations shall abhor him:
25 But to them that rebuke him shall be delight, and a good blessing shall come upon them.
26 Every man shall kiss his lips that giveth a right answer.
27 Prepare thy work without, and make it fit for thyself in the field; and afterwards build thine house.
28 Be not a witness against thy neighbour without cause; and deceive not with thy lips.
29 Say not, I will do so to him as he hath done to me: I will render to the man according to his work.
From Obadiah 1:
12 But thou shouldest not have looked on the day of thy brother in the day that he became a stranger; neither shouldest thou have rejoiced over the children of Judah in the day of their destruction; neither shouldest thou have spoken proudly in the day of distress.
13 Thou shouldest not have entered into the gate of my people in the day of their calamity; yea, thou shouldest not have looked on their affliction in the day of their calamity, nor have laid hands on their substance in the day of their calamity;
14 Neither shouldest thou have stood in the crossway, to cut off those of his that did escape; neither shouldest thou have delivered up those of his that did remain in the day of distress.
15 For the day of the Lord is near upon all the heathen: as thou hast done, it shall be done unto thee: thy reward shall return upon thine own head.
16 For as ye have drunk upon my holy mountain, so shall all the heathen drink continually, yea, they shall drink, and they shall swallow down, and they shall be as though they had not been.
17 But upon mount Zion shall be deliverance, and there shall be holiness; and the house of Jacob shall possess their possessions.
18 And the house of Jacob shall be a fire, and the house of Joseph a flame, and the house of Esau for stubble, and they shall kindle in them, and devour them; and there shall not be any remaining of the house of Esau; for the Lord hath spoken it.
Jesus Alone 